CN111615575A - Sound absorbing roof structure of a lobby with reduced reverberation time - Google Patents

Sound absorbing roof structure of a lobby with reduced reverberation time Download PDF

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Publication number
CN111615575A
CN111615575A CN201880072877.8A CN201880072877A CN111615575A CN 111615575 A CN111615575 A CN 111615575A CN 201880072877 A CN201880072877 A CN 201880072877A CN 111615575 A CN111615575 A CN 111615575A
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China
Prior art keywords
roof
sound
absorbing
strips
girders
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CN201880072877.8A
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Chinese (zh)
Inventor
克里斯蒂安·霍佩
埃尔马·约翰内斯·安东·托贝尔
罗纳德·奇尔施
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Liaver GmbH and Co KG
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Liaver GmbH and Co KG
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Publication of CN111615575A publication Critical patent/CN111615575A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
    • E04B7/022—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs consisting of a plurality of parallel similar trusses or portal frames
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
    • E04B7/04—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs supported by horizontal beams or the equivalent resting on the walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/99—Room acoustics, i.e. forms of, or arrangements in, rooms for influencing or directing sound
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation

Abstract

The invention relates to a sound-absorbing roof structure of a lobby (01) having walls (02), a plurality of roof girders (03) which are arranged at least at their ends on the walls (02), and a sound-reflecting roof skin (06) which is carried by the roof girders (03). On the sides of a plurality of roof girders (03) there are mounted absorber strips (04) which are composed of sound absorber elements. Between adjacent roof girders (03) having absorber strips (04), in each case a sound-reflecting section of the roof skin (06) extends, which has a width of at least twice the average height of the roof girders (03). The invention also relates to a sound absorber installation with sound absorber elements, which is arranged in a lobby (01) having walls (02) and a roof structure closing the lobby upwards, wherein the roof structure has a plurality of roof girders (03) and a roof skin (06) carried by the roof girders. According to the invention, absorption strips (04) composed of a combination of sound absorber elements arranged in a row with one another are fitted on both sides of a plurality of roof girders (03) therein. Finally, the invention relates to a lobby (01) with reduced reverberation time, which lobby uses sound absorber facilities.

Description

Sound absorbing roof structure of a lobby with reduced reverberation time
Technical Field
The present invention relates to a sound-absorbing roof structure of a lobby, a sound absorber installation and a lobby with reduced reverberation time using sound absorber elements and a sound-absorbing absorption strip consisting of such elements.
Background
Elements for improving the acoustic effect in the room, that is to say for better speech intelligibility and for sound absorption for hearing protection, have long been known. Acoustic ceilings constructed of gypsum or fiber board improve indoor acoustics, reduce acoustic echo, and convert acoustic energy into heat. In addition, acoustic wall cladding is known, for example fitted to walls at various angles and sizes and used as a panel for a low frequency absorber for absorbing low acoustic frequencies. In order to absorb high acoustic frequencies, it is common to use perforated plates, which are fitted at a specific distance from the wall. Between the plate and the wall there is a sound absorbing and sound insulating material, such as foam or felt.
DE 102011105608 a1 shows a sound absorber system of the edge absorber type for low frequencies. The device comprises a trough-shaped, preferably square, container in which fibrous or porous absorption material is present, which container has an acoustically opaque or transparent cover. The container is arranged in a corner or edge on a wall or ceiling in the room. The sound absorber facility is characterized in that all sides facing the indoor are configured to be unvoiced. Only the side which is inclined, preferably vertically arranged, with respect to the wall or ceiling has a smaller area which is constructed in an absorbing manner. In order to obtain the desired effect, the containers used must have a minimum size, for which purpose corresponding spaces must be reserved locally. A preferred embodiment uses, for example, an absorber of homogeneous fibres of 400mm x 500mm thickness, which is arranged on the floor close to the indoor edge.
DE 102015109808 a1 describes a sound-absorbing construction element, in particular for use in the outer region, which comprises a sound-absorbing ceiling layer and sound absorber elements embedded therein, the sound absorber elements being more absorbent than the ceiling layer.
EP 2868826 a1 describes a reinforced concrete element on the surface of which a partially exposed, sound-absorbing, at least partially open-cell foamed foam is arranged. The stiffened portion is partially surrounded by foam. Also shown is a ceiling element having a plurality of absorbent strips made of geopolymer. In the case of the use of concrete elements as ceiling too, the absorption strips used extend in the longitudinal direction, but do not extend into the corner region between the wall and the ceiling.
Sound absorber elements composed of sintered expanded glass particles are commercially available, for example, from the company liaver gmbh & co.
Berlin ABC Akustik GmbH in 2011 on the product page, describesIs used for treating diseases not exceeding 20m2Bottom area of (2) and (60 m)3Wherein the spacing between opposing sides of the room should not exceed 5 m. For this purpose, an absorber consisting of an open-cell foamed foam based on melamine resin is fitted in the form of a plaster line in the upper edge of the room between the ceiling and the wall. The absorber projects approximately 14 to 35cm into the room, so that an air gap is present between the absorber and the building wall on the rear side. The absorber must be mounted on the ceiling using a special suspension body.
DE 20022685U 1 describes an acoustically absorbent panel element for eliminating reflected sound in a room, which panel element can be constructed as a suspended ceiling or a decorative wall.
WO 95/30804 a1 describes a sound absorbing system for interior walls and ceilings. The sound-absorbing element is mounted there, for example, on the ceiling and extends as far as the wall. A device is also shown in which the respective components are arranged both on the ceiling and on the wall.
Most of the aforementioned sound absorber solutions which function efficiently either have to be installed from the outset in a room which is acoustically to be improved or have to be modified at considerable expense. From a functional, structural, and design perspective, there is often a target conflict between acoustic effects in a room and other design solutions. For example, good acoustic results can be achieved by the overall laying of the ceiling with sound-absorbing panels, but this no longer makes it possible to arrange the ceiling-mounted air-conditioning elements. The retrofitting of ceilings in existing rooms to block sound is both technically and financially costly and therefore rarely used. The arrangement of the bulky edge absorbers greatly disturbs the aesthetic perception of the space.
A sound absorber installation consisting of a plurality of sound absorber elements is known from the patent application PCT/EP2017/061524, which was not published at the priority date. The plurality of sound absorber elements arranged in a row with one another form one or more absorber strips which extend at least in sections along an upper contact edge extending between the wall and the ceiling of the room.
The (supplemental) noise protection measures in large objects, such as buildings or gymnasiums, have proven to be particularly problematic and costly. Today, there are also stringent noise protection requirements for this. For example, reference is made to: 8 months in 2014 IFA-LSA 01-234,
Figure BDA0002485886390000031
(anti-noise working sheet), Raumakustik in industriellen
Figure BDA0002485886390000032
(indoor acoustic effect of industrial work space).
Due to the large indoor volume, the absorbers mounted on the walls of the building generally absorb less sound in the lobby area. Furthermore, only a few or no absorption elements can be fitted on the wall, since these areas are necessary for other purposes. Especially in the factory, very hard floors are ubiquitous and there is little equipment to absorb sound, so that the noise level when using machinery or processing hard materials will be very quickly in the range where hearing is impaired. In contrast, in most cases, only personal hearing protectors are used, but they are uncomfortable and make communication between people in such a building more difficult. This results in a very large absorber area in the prior art, which is not feasible or very expensive if the relevant noise protection regulations are applied.
Thus, DE 2347136 a shows a self-supporting roof element for a building, which rests with its two ends on a wall and can be used in particular for lobbies. The roof element is provided with horizontal profile chords which extend in the longitudinal direction and are arranged symmetrically in pairs with respect to a vertical plane of symmetry. The chords are connected by a truss structure. In order to achieve thermal or acoustic insulation, the inner side of the surface that is expanded by the truss can be covered with a mat. Since the surface to be covered with insulating material extends at an obtuse angle to the horizontally extending outer roof skin, the area of the insulation formed is considerably larger than the projected area of the roof skin. A common assumption in this respect is that large areas of insulating material must be laid for effective blocking or insulation, but this also leads to high costs.
Disclosure of Invention
Based on the prior art, it is therefore the object of the present invention to provide an improved sound-absorbing roof structure and a roof structure for larger lobbies (500-50000 m)3Volume), in particular a sound absorber installation of a factory building. The sound absorber means used should not impair the original use of the lobby, in particular should not occupy wall area or should occupy only a small wall area. At the same time, a large absorption effect is obtained with less material, so that the costs, in particular for supplementary hall noise protection renovations, remain low despite the large hall area and the large indoor volume. A significant improvement of the acoustic effect of the lobby should be achieved over a wide frequency range. At the same time, the sound absorbing roof structure allows to achieve the desired absorption results in a lobby having an almost unlimited floor area.
The sound-absorbing roof structure according to the appended claim 1 and the sound absorber installation according to claim 13 serve to solve this task, which is also solved by a lobby according to claim 14 having a reduced reverberation time.
The sound-absorbing roof structure according to the invention is a structural component of a lobby having walls, a plurality of roof girders resting on the walls at least at their ends and a sound-reflecting roof skin carried by the roof girders. On the sides of a plurality or all of the roof girders are fitted absorbent strips composed of a combination of sound absorber elements. Between adjacent roof girders with absorption strips, in each case a sound-reflecting section of the roof skin extends, which has a width of at least twice the average height of the roof girders.
The sound absorber installation according to the invention comprises a plurality of sound absorber elements arranged in a lobby having walls and a roof structure upwardly closing the lobby. The roof structure is provided with a plurality of roof girders arranged on the walls and a roof skin carried by the roof girders. According to the invention, on both sides of a plurality or all of the roof girders, absorber strips are fitted, which are composed of absorber elements arranged in line with one another. The roof girders are here usually spaced apart from one another by more than twice, preferably more than four times, their average height, so that the area occupied by the absorption strips is in any case smaller than the projected area of the roof skin. It is essential for the function of the sound absorber arrangement that between the sides of the roof girder on which the absorber strips are laid there is a reflection surface extending at an angle (preferably at right angles) to the absorber strips, which reflection surface is formed by the roof skin not covered by the sound absorbers.
Surprisingly, it has been shown that the fitting of the absorber element only to the side of the roof girder contributes to a considerable sound absorption, which otherwise is possible only with a significantly greater consumption of area. The sides of the roof girder are not normally used for other installations in the lobby and can thus be provided for the absorption element. The volume within the roof structure is also almost completely unused in the plant.
According to the invention, the inner side of the roof skin, which is usually reverberant (schallhart) and is therefore strongly reflected acoustically, acts intentionally as a further reflection surface which reflects the sound waves generated inside the lobby to the absorption element, so that the sound waves are damped there or, if necessary, completely absorbed.
The roof girders may have different structures. It is only important for the present invention that they provide two sides on which the absorbent strips can be arranged. In general, adjacent roof girders are spaced apart from one another by a few meters, preferably from 4m to 8m, in particular from about 5m to 6 m. The interior of the roof structure extends from the lower edge of the roof girder, which is usually formed by the lower chord, up to the inner side of the roof skin, which rests on the upper chord of the roof girder. Typically, the lower and upper chords extend at an angle to each other, such that the sides of the roof girder have a trapezoidal or triangular shape. For the applications concerned here, the height of the roof girder is between 300mm and 1500 mm. Roof trusses having parallel or nearly parallel upper and lower chords are also referred to as carriers or truss carriers. A beam-like or planar filling can be arranged between the upper chord and the lower chord. The roof girders are arranged with their ends on the walls of the lobby and can be additionally supported if necessary in the case of large spans.
According to a preferred embodiment of the sound-absorbing roof structure or sound absorber installation, the absorption strip covers the sides of the roof girder substantially completely, if necessary without tin upper and lower chords. The width of the absorbent strips is preferably in the range of 400mm to 1500mm and thus follows the height of the roof girders. The absorbent strips can be fastened to the upper and lower chords, for example by means of simple metal profiles. It is also possible to glue or otherwise fasten the sound-absorbing panel.
In a development of the sound-absorbing roof structure or sound absorber arrangement, further absorber strips are used which extend along the upper edge of the wall and/or between adjacent roof girders perpendicularly to the sides of the roof girders in the roof structure. These additional absorbent strips cover only a small part of the roof skin between the roof girders, in particular less than a quarter of the area of the roof skin.
A particularly preferred embodiment of the sound-absorbing roof structure or of the sound absorber installation is characterized in that a reflection surface is arranged between the absorber strips facing away from one another on the roof girder, which reflection surface extends between the upper chord and the lower chord of the roof girder. The reflective surface may be an integral part of the roof girder or may be used as a separate component. When sound waves occur, they first pass through the sound absorber elements and are damped, exit from their back side and then (preferably after passing through the air gap) impinge on the reflective surface and are thereby reflected back to the sound absorber elements in order to be damped again there.
The thickness of the sound absorber element is preferably 20mm to 65mm, particularly preferably about 25 mm. It is also advantageous if the flow resistance per unit length of the sound absorber element is 7 to 15kPa s/m4Preferably 8 to 12 kPa/s/m4Particularly preferably about 10 kPa/s/m4Within the range of (1).
In a preferred embodiment, the sound absorber element consists of inextensible foam, in particular glass-based, acoustically effective and diffusely permeable foam, which comprises expanded glass particles. Preferably, the sound absorber element is composed of expanded glass particles with a particle size of 0.25mm to 4mm, wherein the particles are sintered in sheet form or are connected with an added binding agent, and wherein the flow resistance per unit length is preferably in the range of 9 to 11kPa s/m4Within the range of (1). The preferred flow resistance per unit length of the sound absorber element can be easily adjusted by the particle size used, i.e. the particle size distribution in the sound absorber element, which is preferably of sheet-like design, and/or by the proportion of the bonding agent added to the expanding gas particles during the production process.
The material used for the absorbent strips is suitable for wet rooms, frost-proof, non-combustible and very light. The material for the absorbent strips can also be easily cut. Due to the low weight, no static problems occur on the roof girders, since these are usually designed for about 25-30 kg/m2The mounting load of (2).
It is advantageous for the functionality of the invention that the flow resistance per unit length of the sound absorber element is between 7 and 15kPa s/m4Preferably 9 to 11 kPa/s/m4Should be as uniform as possible.
The lobby with reduced reverberation time according to the invention can be used for different purposes, in particular as a factory building or workshop, as a gym or as a swimming pool. The lobby has walls and a roof structure, wherein the roof structure includes a plurality of roof trusses disposed on the walls and a roof skin carried by the roof trusses. The previously described sound absorber arrangements are arranged on a plurality or all of the roof girders.
A major advantage of the lobby with reduced reverberation time achieved according to the invention is that by arranging the absorption strips on the roof girders, a particularly high sound absorption can be achieved. This high absorption effect is achieved in particular by the reflection of sound waves occurring in this region on the inner skin of the roof. The sound absorber installation can be integrated in an existing lobby in an additive manner at low cost and requires only a small installation space in a roof space that is not normally used. By arranging the absorbent strips on the roof girders, the area and volume available for other uses in the lobby is not limited or only minimally limited.
Due to the use according to the invention of sound absorber elements on the sides of the roof girder, it is possible for the first time to achieve a very effective sound absorption, while the volume of sound absorbing material is small and the area occupied by the sound absorber installation is achieved over a wide frequency range. In particular, it is possible to fit relatively thin sound absorber elements in the immediate vicinity of the acoustically strongly reflecting roof skin. For this particularly effective absorption it is advantageous if the flow resistance per unit length is adjusted within the ranges mentioned, for example by a suitable choice of the grain size and material composition of the sound absorber elements used. Particularly preferably, the sound absorber elements consist of expanded glass particles with a particle size of 0.25mm to 4mm, which are sintered to a sheet form or are connected with an added binder.
The invention therefore also uses a combination of the described characteristics of the sound absorber elements and their mentioned arrangement in the lobby.
According to a particularly preferred embodiment, a further absorption strip extends at the upper end of the wall of the lobby.
There are no specific size restrictions for lobbies with reduced reverberation time, since the application of the sound absorber installation is arbitrarily scalable due to the number of correspondingly lifted roof girders.
With the sound absorber installation used according to the invention, a reverberation time in the range of 0.6s to 1.3s, which corresponds to the desired value in the communication room, can be achieved in the lobby. The sound absorber arrangement is particularly suitable for damping in the frequency range of 250Hz to 4 kHz.
Drawings
Further details and advantages of the sound absorber installation according to the invention and of a lobby equipped with it emerge from the following description of a preferred embodiment with reference to the accompanying drawings. Wherein:
fig. 1 shows a plan view of a ceiling, not to the correct scale, of a first embodiment of a lobby having reduced reverberation time according to the present invention;
fig. 2 shows a schematic diagram of the course of sound waves on the roof skin and on the absorber strips fastened to the roof girders;
FIG. 3 shows an out of scale ceiling plan of a second embodiment of a lobby having reduced reverberation time;
fig. 4 shows a detailed view of the arrangement of the absorber strips on the roof girder in two supplementary installation embodiments;
fig. 5 shows in two integrated embodiments a detailed view of the arrangement of the absorber strips on the roof girder;
fig. 6 shows a graph for representing measured values of reverberation time in halls of different configurations over a wide frequency range.
Detailed Description
Fig. 1 shows a plan view of a not to the right scale ceiling of a lobby 01 with reduced reverberation time according to the invention. The floor area of the lobby illustratively extends by 21.5m by 17.5 m. The lobby is equipped with sound absorber facilities according to the invention, which are designed as sound-absorbing roof structures. The lobby 01 has walls 02 and three built-in roof girders 03, which carry a roof skin 06 (fig. 2). On the sides of the roof girder 03, in each case absorbent strips 04 are fitted, which cover substantially the entire side. In the example shown, the roof girders laid on both sides with the absorption strips are spaced apart from each other by about 5.4 m. The same general distance also exists between the end walls and the respectively immediately adjacent roof girders. Between the roof girders 03, in each case, sections of the roof skin 06 extend, which are reverberant and whose width is greater than twice the average height of the roof girders.
Each absorber strip 04 is composed of one or preferably a plurality of sound absorber elements, which are composed of inextensible foam, preferably glass-based foam with expanded glass particles. The material is very suitable for sound insulation and is easy to process. The sound absorber element has an absorption coefficient of, for example, α ═ 0.4.
The absorbent strips have a width that is matched to the height of the roof girder and a thickness of, for example, 25 mm. The absorption bars 04 are preferably plate-shaped. In order to form the absorber strip, a plurality of sound absorber elements are arranged in line with one another with little or no play. It is clear that a small spacing between the sound absorber elements has little effect on the result of the acoustic damping.
Fig. 2 shows in a simplified manner the arrangement of the absorber strips 04 on the roof girder 03. It can be seen that the roof skin 06 rests on the roof girder 03 and that the absorbent strips cover substantially the entire height of the sides of the roof girder. The reflections of the scattered sound waves occurring on the roof skin 06 are shown in a greatly simplified manner by means of arrows. The incident sound waves are reflected at the roof skin and redirected into the absorption strips, whereby a particularly good absorption is achieved by means of the absorption strips 04.
Fig. 3 shows a plan view of a ceiling, not to the right scale, of a second embodiment of the lobby 01 with reduced reverberation time. The floor area of the lobby is again illustratively 21.5m by 17.5 m. In addition to the three internal roof girders, further absorber strips 07 are arranged here at the upper end of the end walls and on the side walls between the roof girders.
Fig. 4 shows a simplified cross-sectional view of a roof girder 03 with an upper chord 08, a lower chord 09 and a stiffening girder 10 between them. In this case, the retaining profile 11 is fitted on the roof girder for fastening the absorber strips 04. On the left side of the figure, the absorbent strip is held between an upper and a lower holding profile 11, which are held tightly on the upper or lower chord, respectively. As shown on the right-hand side of the figure, a retaining profile 11 which is fastened only to the upper chord 08 but encloses the upper and lower edges of the absorbent strip can alternatively be used for this purpose. In this case, the holding profile 11 has a back 13 that is open to sound (schalloffen). In the preferred embodiment, between two sound-open absorbing strips 04 on the back side of the roof girder facing away from each other there is a sound-reflecting wall 12 positioned between the side of the roof girder and the absorbing strips in order to reflect sound waves penetrating the absorbing strips back into the absorbing strips. Preferably, an air gap is left between the absorbing strips and the reflecting wall 12, which air gap leads to a further movement of the sound waves, which has a positive effect on the absorption due to the resulting interference and impedance.
Fig. 5 shows two further embodiments of the arrangement of the absorber strips 04 on the roof girder 03. These variants are particularly suitable when the absorber strips are not fitted to the roof girder only after the completion of the lobby, but rather when the sound absorption of the roof girder has already been modified at the construction stage, which is preferably already present during the production. For this purpose, the absorber strips 04 are preferably integrated into the roof girder 03. On the left in fig. 5, the absorbent strip is inserted between the upper chord 08 and the lower chord 09, so that the retaining profile can be omitted. The absorbent strips may be fastened to the support structure 10 and/or to the upper and lower chords. On the right side of the figure, the first section of the absorption strip 04 is again arranged between the upper and lower chords, while the other sections are fitted in the double-T-shaped profile of the upper and lower chords. Thereby increasing the available absorption area and also improving the visual design.
Fig. 6 shows a graph of a plot of reverberation time over a wide frequency range of a plurality of measured values. The respective curves were recorded in the same lobby having a floor area of 21.5m x 17.5m and a height of 4.9 m.
Curve 1) (shown as an unmarked dash-dotted line) shows the course curve of the reverberation time in the original lobby, that is to say without sound absorber facilities installed. The reverberation time averages 1.52s and is therefore much higher than the value of 1.1s required by DIN 18041 for a speech environment (dashed line).
Curve 2) (shown as a solid line with square marks) shows the reverberation time after the installation of the absorber strips on three built-in roof girders according to the arrangement shown in fig. 1. In this case, the width of the absorbent strip is 630 mm. The reverberation time is reduced on average to an average of 0.93s at all frequencies.
Curve 3) (shown as a dashed line with diamond marks) shows the reverberation time in the lobby, in addition to the absorption strips on the roof girders, further absorption strips with a width of 630mm are fitted round on the side and end walls according to the embodiment shown in fig. 3. The acoustic absorption is only slightly improved by the multiple mounting. The reverberation time is 0.86 s.
Curve 4) (shown as a solid line with triangular marks) shows the reverberation time in the lobby again according to the arrangement of fig. 1. The absorbent strips are only located on the three built-in roof girders. However, the width of the absorbent strip was doubled to 1240mm and the thickness remained unchanged. It is shown that in this way a significantly reduced reverberation time of 0.66s can again be achieved.
The effect that can be achieved by the sound absorber arrangement according to the invention becomes particularly evident when comparing the absorption area required here with the absorption area that would be computationally (in the case of the use of the saint's formula) required in the case of the same absorption performance to be achieved by a closed absorption area extending parallel to the ground. The values are given in the following table:
absorption area (a ═ 0.40) and reverberation time
Figure BDA0002485886390000121
From the values mentioned in the table it is clear that the required absorption area can be reduced to less than 30% of the area calculated according to the prior art by means of the device according to the invention.
List of reference numerals
01-lobby with reduced reverberation time
02-wall
03-roof girder
04-absorbing strip
05---
06-roof skin
07-additional absorbent strips on the side walls
08-top chord
09-lower chord
10-truss reinforcement
11-holding section bar
12-reflecting wall
13-open back side of holding profile for sound

Claims (14)

1. Sound-absorbing roof structure of a lobby (01) having walls (02), a plurality of roof girders (03) which are arranged at least at their ends on the walls (02), and a sound-reflecting roof skin (06) which is carried by the roof girders (03), characterized in that absorption strips (04) which are composed of sound absorber elements are fitted on the sides of a plurality of the roof girders (03), wherein sound-reflecting sections of the roof skin (06) each extend between adjacent roof girders (03) having the absorption strips (04), said sections having a width which is at least twice the average height of the roof girders (03).
2. Sound-absorbing roof structure according to claim 1, characterized in that the absorbing strips (04) cover substantially completely all the sides of the roof girders (03) located in the inner space of the lobby (01).
3. Sound-absorbing roof structure according to claim 1 or 2, characterized in that a further absorbent strip (04) extends along the upper edge of the wall (02) and/or between adjacent roof girders (03) in the roof structure.
4. Sound absorbing roof structure according to one of the claims 1 to 3, characterized in that between the absorber strips (04) facing away from each other on the same roof girder (03) there is arranged an acoustically stiff reflective wall (12) extending between the upper chord (08) and the lower chord (09) of the roof girder (03).
5. Sound-absorbing roof structure according to claim 4, characterized in that between the absorbing strips (04) and the reflecting walls (12) respectively air gaps are left.
6. Sound absorbing roof structure according to any of the claims 1 to 5, characterized in that the sound absorber elements of the absorber strips (04) have a thickness of 20-65 mm, preferably 25 mm.
7. Sound absorbing roof structure according to any of the claims 1 to 6, characterized in that the sound absorber elements of the absorbing strips (04) have a sound absorption of at 7kPa x s/m4～15kPa*s/m4Flow resistance per unit length within the range.
8. Sound absorbing roof structure according to one of the claims 1 to 7, characterized in that the sound absorber elements consist of inextensible foam, in particular glass-based foam, which comprises expanded glass particles.
9. The sound absorbing roof structure of claim 8, wherein the sound absorber elements are comprised of expanded glass particles having a particle size of 0.25mm to 4mm, wherein the particles are sintered into sheets or joined with an added binder, and wherein the flow resistance per unit length is 9kPa s/m4～11kPa*s/m4Within the range of (1).
10. Sound absorbing roof structure according to any of the claims 1-9, characterized in that the roof girders (03) are spaced from each other by more than four times their average height.
11. The sound absorbing roof structure according to any of the claims 1 to 10, characterized in that the area occupied by the absorbing strips (04) on the sides of the roof girder (03) is smaller than the projected area of the roof skin (06).
12. Sound-absorbing roof structure according to one of the claims 1 to 11, characterized in that the roof skin (06) extending between the sides of the roof girders (03) laid with the absorbing strips (04) is not covered with sound-absorbing material.
13. Acoustic absorber installation comprising a plurality of acoustic absorber elements, which are arranged in a lobby (01) having walls (02) and a roof structure upwardly closing the lobby, wherein the roof structure has a plurality of roof girders (03) resting on the walls and a roof skin (06) carried by the roof girders (03), characterized in that in each case on both sides of a plurality of roof girders (03) there are fitted absorbent strips (04) composed of an assembly of acoustic absorber elements, wherein the roof skin (06) extends between the roof girders (03) with absorbent strips (04) with a width of more than twice the height of the absorbent strips.
14. Lobby (01) with reduced reverberation time, characterized in that it comprises a sound-absorbing roof structure according to any of claims 1-12.
CN201880072877.8A 2017-11-11 2018-11-08 Sound absorbing roof structure of a lobby with reduced reverberation time Pending CN111615575A (en)

Applications Claiming Priority (3)

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DE102017126506.6 2017-11-11
DE102017126506.6A DE102017126506A1 (en) 2017-11-11 2017-11-11 Sound absorber arrangement and hall with reduced reverberation time
PCT/EP2018/080632 WO2019092115A1 (en) 2017-11-11 2018-11-08 Sound-absorbing roof construction of a hall having reduced reverberation time

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CN111615575A true CN111615575A (en) 2020-09-01

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US (1) US20200270860A1 (en)
EP (1) EP3707318A1 (en)
JP (1) JP2021502502A (en)
CN (1) CN111615575A (en)
AU (1) AU2018363745B2 (en)
DE (1) DE102017126506A1 (en)
RU (1) RU2769015C2 (en)
WO (1) WO2019092115A1 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29500435U1 (en) * 1995-01-12 1995-03-02 Construmat Ag Roof construction and insulation element for such a roof construction
JPH1046699A (en) * 1996-08-05 1998-02-17 Taisei Corp Soundproof construction utilizing structural framework in large space
JPH10311105A (en) * 1997-05-12 1998-11-24 Jutaku Toshi Seibi Kodan Soundproof ceiling structure
JPH116201A (en) * 1997-04-23 1999-01-12 Yasuyuki Okazaki Domed structure and exhaust duct
DE20022685U1 (en) * 2000-11-29 2002-01-17 Sto Ag Acoustically absorptive panel element
JP2004251002A (en) * 2003-02-20 2004-09-09 Masakatsu Uchida Lightweight building made of heavyweight steel construction
KR100916352B1 (en) * 2008-04-14 2009-09-11 주식회사 동진이엔지 A soundproof wall using the aerated concrete
EP2130985A2 (en) * 2008-06-04 2009-12-09 Lahnau Akustik GmbH Sound absorbing panel
CN101999145A (en) * 2008-04-10 2011-03-30 普利司通可美技株式会社 Sound-absorbing composite structure
CN104343206A (en) * 2014-11-04 2015-02-11 沈阿宝 Muffling keel
CN206418644U (en) * 2017-01-06 2017-08-18 山东飞越钢结构工程有限公司 A kind of Architectural Equipment roof

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157251A (en) * 1960-05-02 1964-11-17 Nat Steel Corp Building construction
FR2199571B1 (en) * 1972-09-19 1975-01-03 Theault Yves
JPS5444317A (en) * 1977-09-13 1979-04-07 Toyo Kankiyou Gijiyutsu Sentaa Sound insulation building
JPS59112632U (en) * 1983-01-21 1984-07-30 日本鋼管株式会社 Sound absorbing membrane for membrane structure
JP3105122B2 (en) * 1993-11-24 2000-10-30 セントラル硝子株式会社 Sound-absorbing composite molded article and its production method
SE507187C2 (en) 1994-05-10 1998-04-20 John Fellert Sound absorption system for interior walls, ceilings etc in buildings and method for making such sound absorption system
US5623130A (en) * 1995-11-20 1997-04-22 Noxon; Arthur M. System for enhancing room acoustics
RU40637U1 (en) * 2004-04-20 2004-09-20 Осипенков Александр Александрович DEVICE FOR PROTECTION AGAINST ACOUSTIC NOISE OF RESIDENTIAL HOUSES
US8733461B2 (en) * 2006-06-27 2014-05-27 Jeffrey Pigeon Fire sprinkler system and method of installation
JP5069919B2 (en) * 2007-02-07 2012-11-07 エムケー精工株式会社 Silencer
JP5581010B2 (en) * 2009-06-05 2014-08-27 ブリヂストンケービージー株式会社 Sound absorption panel
DE102011105608B4 (en) 2011-06-27 2020-02-27 Forschungsgesellschaft für Systemsicherheit und Arbeitsmedizin e.V. (FSA e.V.) Sound absorber arrangement for a wide frequency range with an edge absorber
EP2868826A1 (en) 2013-10-31 2015-05-06 Basf Se Concrete element containing an acoustic absorber
DE102015109808A1 (en) 2015-06-19 2016-12-22 Liaver Gmbh & Co. Kg Sound-absorbing component and soundproof wall with such

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29500435U1 (en) * 1995-01-12 1995-03-02 Construmat Ag Roof construction and insulation element for such a roof construction
JPH1046699A (en) * 1996-08-05 1998-02-17 Taisei Corp Soundproof construction utilizing structural framework in large space
JPH116201A (en) * 1997-04-23 1999-01-12 Yasuyuki Okazaki Domed structure and exhaust duct
JPH10311105A (en) * 1997-05-12 1998-11-24 Jutaku Toshi Seibi Kodan Soundproof ceiling structure
DE20022685U1 (en) * 2000-11-29 2002-01-17 Sto Ag Acoustically absorptive panel element
JP2004251002A (en) * 2003-02-20 2004-09-09 Masakatsu Uchida Lightweight building made of heavyweight steel construction
CN101999145A (en) * 2008-04-10 2011-03-30 普利司通可美技株式会社 Sound-absorbing composite structure
KR100916352B1 (en) * 2008-04-14 2009-09-11 주식회사 동진이엔지 A soundproof wall using the aerated concrete
EP2130985A2 (en) * 2008-06-04 2009-12-09 Lahnau Akustik GmbH Sound absorbing panel
CN104343206A (en) * 2014-11-04 2015-02-11 沈阿宝 Muffling keel
CN206418644U (en) * 2017-01-06 2017-08-18 山东飞越钢结构工程有限公司 A kind of Architectural Equipment roof

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DE102017126506A1 (en) 2019-05-16
US20200270860A1 (en) 2020-08-27
EP3707318A1 (en) 2020-09-16
RU2020118742A (en) 2021-12-13
JP2021502502A (en) 2021-01-28
RU2020118742A3 (en) 2022-01-26
AU2018363745B2 (en) 2024-05-02
AU2018363745A1 (en) 2020-06-04
RU2769015C2 (en) 2022-03-28

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